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You want to take a picture of a 4.5 m tall giraffe at the zoo. Your camera has a focal length of 50 mm and the size of the camera's CCD array is 4.8 mm. How far from the giraffe do you need to stand for the image to just fit on the array?
A pendulum hangs from an inclined wall. Suppose that this pendulum is released at an initial angle of 10 degrees and it bounces off the wall elastically when it reaches an angle of -5 degrees
An object with a mass of 5.10 kg is attached to the free end of the lightstring wrapped around a reel radius R=0.25 m and mass 3kg the reel is a solid disk, free to rotate in a vertical plane about the horizontal axis paasing through its center th..
the dome of a van de graaff generator receives a charge of 2. 10-4 c. find the strength of the electric field in the
A 5.17-g bullet is moving horizontally with a velocity of +340 m/s, where the sign + indicates that it is moving to the right, What is the velocity of the second block after the bullet imbeds itself
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, Find the mass of the gold in the rock
question a simple harmonic oscillator takes 3.0 seconds to undergo 30 complete vibrations. find the frequency in hz
A stone is dropped into a river from a bridge at a height h above the water. Another stone is thrown vertically down at a time t after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second sto..
A beam of 800 keV gamma is mormally incident on a sheet of lead 12mm thick. the rate of energy transmission is 3x10^5 MeV s^-1. What fraction of the incident photon energy is absorbed in the sheet? How many photons per second are incident on the she..
A bird flies 3.6km due west and then flies 1.2km due north, What is the angle between the net displacement vectors of the 2 birds
Two resistors have resistances R(smaller) and R(larger), where R(smaller)
q1. the flywheel of an engine has a moment of inertia 2.20 rm kg cdot rm m2 about its rotation axis. what is its final
Two particles are created in a high-energy accelerator and move off in opposite directions. What is the speed of the second particle, as measured in the laboratory
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